Rachel Eileen Reilly Villegas is an American television personality. Reilly appeared in two seasons of the U.S. edition of the reality TV series Big Brother, winning season 13 in 2011. She has also participated in two seasons of The Amazing Race with her husband Brendon Villegas, placing third both occasions. She participated in a third season with her sister Elissa Slater, placing seventh. She has also won Celebrity Fear Factor and Snake in the Grass.

Big Brother is an American television reality competition show based on the Dutch reality show of the same name created by producer John de Mol Jr. in 1997. The series takes its name from the character in George Orwell's 1949 novel Nineteen Eighty-Four. The American series launched on July 5, 2000 on CBS, and since the discontinuation of the Spanish version in 2022, is the longest-running adaptation in the Big Brother franchise.